net: bcmgenet: Implement RX coalescing control knobs

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Add support for the ethtool rx-frames coalescing parameter which allows
defining the number of RX interrupts per frames received. The RDMA
engine supports a configurable timeout with a resolution of
approximately 8.192 us.

We can no longer enable the BDONE/PDONE interrupts as those would
fire for each packet/buffer received, which would defeat the MBDONE
interrupt purpose. The MBDONE interrupt is guaranteed to correspond to a
PDONE/BDONE interrupt when the threshold is set to 1.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Florian Fainelli 2015-09-16 16:47:40 -07:00 • committed by David S. Miller

parent 2f9130709d

commit 4a29645bfe

2 changed files with 105 additions and 3 deletions

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105

drivers/net/ethernet/broadcom/genet/bcmgenet.c

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3

drivers/net/ethernet/broadcom/genet/bcmgenet.h

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